How does running over 50 accounts on one ip work?

So I know that we should use 3-5 accs max on a residential ip, but I'm wondering how does it work if you are living in a dorm like me and there are over 50 ig accs connected to the same IP address?

I get that we are all connected through a different device id, but still don’t get the logic behind it as that can easily be manipulated by 1 person as well.

This might help in answering your question: https://serverfault.com/questions/158677/how-are-college-campus-networks-typically-structured

As with accounts, IP ranges can also have something like a trust score. It can increase or decrease overtime by the number of legit accounts that use those IP ranges. One of the main reason why mobile proxies are semi-bulletproof.

most of company counts user device mac id instead of IP address Including Google, Facebook , Yahoo , some countires in asia there is multi thousand of users using 1 ip by using microtik ,switch and router, i know some local ISP and they have only 1 IP and there is mutli thousand account under 1 ip, as my business is related to ISP i have client In india,bangla,sri lanka, pakistan, vietnam and mynmar .

you can use unlimited account under 1 ip using router max 3 to 5 is for per device but not limited per ip.

I think It can be either just 1 or Unlimited depending on the core web software you are running on the web server. In order for the web server to run multiple sites on the same IP, it has to use something called “Virtual Hosts”. This feature is inbuilt into Apache and works seamlessly with control panels like cPanel to get this done, so no worries. But with web servers that run Nginx, this requires you to hard code some work around within the Nginx configuration file. Also, if you need to host multiple SSL certificates on the same IP, your server should support something called “SNI” without which you will be able to apply only 1 SSL certificate to a single IP address and for any other shared website on the same IP, if you type in https, it will redirect to that site with the SSL

Because they are real accounts that gained trust over time. Even if 100 are connected to public wifi the actions done are totally different by each accounts, real people don't follow aggressively, log of each activity is send to Instagram that helps to decide if its bot or human, most of them just scroll feed and exit

Bro, how can I contact you?
I can't see the option to pm you so can we talk somewhere else?

I will give you the logic about it
Normal people won't follow 500 per day and like 1000 every day
so the number of action play a role too